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Dual-template synthesis of interconnected 3D hollow N-doped carbon network for electrochemical application

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(2), pp.409-418
  • DOI : 10.1007/s42823-022-00429-4
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : September 13, 2022
  • Accepted : October 21, 2022
  • Published : March 1, 2023

Chen Liang 1 Yang Lanyun 1 Xu Chenxi 2 Chen Kechun 3 Wang Wei 4 Yang Liming 3 Hou Zhaohui 4

1Key Laboratory of Advanced Carbon Functional Materials, Department of Chemical and Chemical Engineering, Hunan Science and Technology, Weiyang City, Hunan Province, China
2College of Chemistry and Chemical Engineering, Hunan University
3Nanchang Hangkong University
4Key Laboratory of Hunan Province for Advanced Carbon‒based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang

Accredited

ABSTRACT

Recently, hollow carbon spheres (HCS) have aroused great interests in the field of energy storage and conversion owing to their unique morphology, structure and other charming properties. Nevertheless, unsatisfactory electrical conductivity and relatively poor volumetric energy density caused by inevitable gaps between discrete carbon spheres greatly impede the practical application of HCS. In this work, for the first time we propose a novel dual-template strategy and successfully fabricate interconnected 3D hollow N-doped carbon network (HNCN) by a facile and scalable pyrolysis process. By systematical characterization and analysis, it can be found that HNCN is assembled by HCS and lots of mesoporous carbon. Compared to the counterparts, the obtained HNCN exhibits unique 3D interconnected architecture, larger specific surface area, hierarchical meso/macropore structure, higher structure defects, higher N doping amount and more optimized N configurations (especially for pyridinic-N and graphitic-N). As a result, these advantageous features endow HNCN with remarkably promoted electrochemical performance for supercapacitor and oxygen reduction reaction. Clearly, our proposed dual-template strategy provides a good guidance on overcoming the intrinsic shortcomings of HCS, which undoubtedly broadens their application in energy storage and conversion.

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